Development of organic/inorganic composite adsorbent for carbon dioxide capture

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K04330
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 22060:Environmental systems for civil engineering-related
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: Morimoto Kazuya 国立研究開発法人産業技術総合研究所, 地質調査総合センター, 主任研究員 (10565683)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 二酸化炭素 / 吸着材 / 回収

Outline of Final Research Achievements

In order to develop a selective separation and recovery technology for low-concentration CO2, we attempted to develop a new CO2 adsorption/desorption material that can be handled as a solid by compositing amine-based organic molecules and an inorganic carrier.
In the study of different types of inorganic carriers with different compositions and crystal structures, an aluminosilicate mineral material with a large specific surface area obtained by low-temperature hydrothermal synthesis showed a high adsorption capacity under low-concentration CO2 conditions after loading with amine-based organic molecules.
From an examination of the optimum conditions for the method of loading amine-type organic molecules onto the inorganic carrier, it was possible to synthesize a composite material that exhibits the same CO2 adsorption properties as when using a solvent by using a reaction solvent-free method in which the amine-type organic molecules and inorganic carrier are directly blended.

Free Research Field

鉱物学

Academic Significance and Societal Importance of the Research Achievements

有機／無機複合吸着材の開発においては、有機物質および無機材料の単独では発揮できない二酸化炭素の吸脱着特性をもつ材料が合成できることが期待でき、既存技術と比較して性能面・コスト面で優位なより実用的な二酸化炭素分離・回収技術として提案できる。
研究成果を基に、将来的にCCU技術として展開することが期待され、吸着材によって回収した二酸化炭素をハウス栽培で作物に施用する農業分野での利用や、安定的な供給が危惧されている炭酸ガス製造への利用などにもつながる。